CDC Study: HEPA Air Purifiers Reduced COVID-19 Spread in Schools

We previously discussed how HEPA filters are extremely effective at removing virus and COVID-19 sized particles. But data was lacking on how exactly air purifiers affect COVID-19 transmission and virus spread. But now, thanks to a CDC study in Georgia schools, we have data on how HEPA air purifiers can affect virus spread and infection rate.

CDC Study Finds Lower Infection Rates in School Classrooms Using HEPA Filter Air Purifiers

CDC Study on COVID-19 Spread in Schools

123 elementary schools participated in the CDC study. The goal of the study was to analyze the effectiveness of HEPA air purifiers and ventilation on the spread of COVID-19. The results? Infection rates were significantly lower for schools using HEPA air purifiers in their classrooms than those that did not.

Read More: Schools: Don’t Use This Air Purifier for COVID-19 Protection

Classrooms with HEPA Air Purifiers Had a 41% Lower COVID-19 Infection Rate

Schools that used HEPA filters in their classrooms had a 41% lower COVID-19 rate compared to those who did not.

But what about…

This data is great, but one potential problem is that these schools might be different in other ways. For example, maybe the schools that used HEPA filters are in communities where people care more about the virus or have more money to fight it.

The researchers controlled for that by comparing schools with the same rates of infection in the community at large. Even after taking local infections (outside the school) into account, these reductions remained the same.

Improving Ventilation Also Helped Significantly

HEPA air filters were not the only effective COVID-19 prevention strategy used by schools. The elementary schools that did not use HEPA air filters but improved the ventilation within their classrooms also had a significant decrease in the COVID-19 infection rate. Although not as effective as HEPA filters, classrooms with improved ventilation had a 29% lower virus infection rate compared to those with no improved ventilation.

CDC Study Finds Lower Infection Rates in School Classrooms Using HEPA Filter Air Purifiers

Read More: Air Purifiers for Classrooms | COVID-19 Protection Guide

What if HEPA Filters Are Used With Improved Ventilation?

Improved ventilation and the use of HEPA filters both lowered COVID-19 infection rates significantly. But what if both virus prevention strategies are used together? The results were even better, with virus transmission over 47% lower than schools that used neither prevention strategy.

How Smart Air Protects Students & Teachers in Schools

Smart Air is a certified B Corp and social enterprise committed to protecting students and air breathers in schools and classrooms. Smart Air’s no-nonsense Blast & Blast Mini air purifiers are being used by schools all across the globe. A few schools include the University of Chicago and the American Embassy School. Smart Air’s purifiers remove the same particles as the big companies for a fraction of the cost.

Sqair in the classroom to protect students in school from COVID-19
The Sqair being used at an international school in Thailand. Two Sqairs are recommended for the average sized classroom to provide optimal airflow.

Smart Air’s powerful Blast air purifier has a high airflow and can clean classrooms and school halls up to 130 sqm (1400 sqft) in size. When run on low, it’s quiet mode can clean classrooms up to 60 sqm (650 sqft) without disturbing classroom lessons.

Smart Air in Schools for COVID-19 Protection: Blast vs competition

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Smart Air is a social enterprise that creates simple, no-nonsense air purifiers and provides free education to protect people’s health from the effects of air pollution. We are proud to be the only certified B-Corp dedicated to fighting air pollution.